View Compilation Error

0_0_33964190_7566.cpp: In function 'long long int find(long long int)':
0_0_33964190_7566.cpp:15:11: error: 'fa' was not declared in this scope
     if(x==fa[x]) return x;
           ^
0_0_33964190_7566.cpp:16:12: error: 'fa' was not declared in this scope
     return fa[x]=FIND(fa[x]);
            ^
0_0_33964190_7566.cpp:16:28: error: 'FIND' was not declared in this scope
     return fa[x]=FIND(fa[x]);
                            ^